Disk brake with brake mechanism

FIELD: mechanical engineering; disk brakes.

SUBSTANCE: proposed disk brake contains caliper enclosing brake disk and provided with cavity for mounting brake mechanism. Brake mechanism has support bracket installed inside in port in caliper wall furthest from brake disk. Brake mechanism is provided with adjuster, adjusting shaft and shaft for restoring initial position. Device is used to transmit motion between shafts to adjust and restore initial position. Adjuster is set into operation by pin of lever arranged on brake mechanism lever and is installed in support bracket at assembling.

EFFECT: improved synchronization of adjusting motion between two thrust units of brake mechanism, provision of compactness, facilitated servicing of brake mechanism.

10 cl, 8 dwg

 

The present invention relates to a disk brake, containing the brake mechanism. The brake mechanism is installed in the brake caliper. The caliper is equipped with a window for receiving the support bracket of the brake mechanism.

The brake mechanism corresponding to the present invention is primarily intended for heavy road vehicles, but can also be used for lighter road vehicles or rail vehicles.

As wear of the brake pads disc brake position the bearing plate or plates usually change to compensate for wear. Without regulation the provisions of the stroke of the brake ultimately may become unusable. This position change using the adjustment mechanism, which removes the possible backlash every time during braking. In the normal composition used two persistent node, and the backlash should be removed to the same extent by each of the thrust units. Thus, the movement controlled by the adjusting mechanism must be synchronized to perform the same adjustment of both thrust units and, thus, eliminate uneven wear of the brake pads.

Currently known adjusting mechanism for eliminating backlash brakes. Also known synchronization of the controlled motion of p is polirovochnaja mechanism between two nodes.

The brake mechanism corresponding to the present invention includes drive means including an adjusting mechanism of the prior art. In addition, the drive means includes two thrust node. Synchronization thrust units is performed as an additional action of the drive means. The brake mechanism also includes a support bracket. Support bracket install inside the window brake caliper. The adjustment mechanism is installed in the bearing bracket. Brake caliper covers brake disc and has a recess for mounting the brake mechanism.

The present invention is to obtain high quality, belonging to the function synchronization regulating movements between the two thrust units of the brake mechanism.

Another challenge is getting the brake mechanism, which is practical from the point of view of maintenance and replacement of parts.

Another challenge is getting more compact and precise brake mechanism.

The above objectives are achieved by creating a brake mechanism that contains a bracket mounted inside the window of the carriage. The brake mechanism includes an adjusting mechanism and shafts to adjust and restore the original position. The adjusting mechanism is in action the e finger lever, located on the lever of the brake mechanism, actuated by a pneumatic cylinder or similar means. The adjusting mechanism installed in the support bracket during Assembly.

In one embodiment of the invention all the details, ensuring synchronization, including the adjustment mechanism is installed in the support bracket. This means that you can have a clearly expressed hypoid drive. Drive forms one unit with the lever, the synchronizing shaft and the adjusting mechanism.

In the second embodiment of the invention in the support bracket is a set of gears as part of the drive means. A set of gears performs an additional function of synchronizing the movement between the two thrust units. Through the use of spur gears here will not occur coonabarabran power when transmitting torque, whereby the restoration of the original position of the mechanism will be easier. In addition, the torque adjusting mechanism can be smaller in size.

In the third embodiment of the invention the details, ensuring synchronization, located under cross rail, allowing for more compact mechanism. The actuator will rotate the sleeve using a single bearing plate. Plate mo which should be used to provide a balance of pressure on the brake pads, with a suitable design.

The brake mechanism corresponding to the present invention, preferably is driven by a pneumatic method, but it can also operate hydraulically or electrically.

Other objectives and advantages of the invention will be understood by a person skilled in the art when reading the following description.

Embodiments of the invention will be described in more detail below on the example and with reference to the drawings, which depict:

Figure 1 - cross section of the brake mechanism, corresponding to the invention,

Figure 2 is a perspective view of the brake mechanism shown in figure 1, showing the two blocks forming the brake mechanism

Figure 3 - an example of executing caliper used with all the shown variants of execution of the brake mechanism,

4 is a perspective view of the second variant of execution of the brake mechanism according to the invention,

5 is a cross-section of the brake mechanism shown in Figure 4,

6 is a cross-section of the caliper and the other alternative execution of the brake mechanism according to the invention,

Fig.7 is a perspective view of the brake mechanism shown in Fig.6, and

Fig is a perspective view of another variant of execution of the brake mechanism according to the invention.

The brake mechanism corresponding to the embodiment of the invention shown in figures 1 and 2, includes a lever 1 mounted in a bracket 2 that is installed in the window 17 of the caliper 16. The lever 1 is the effect on the transverse rail 3. The lever 1 is supported by roller bearings 20, 21 arranged in the bearing bracket 2 and the cross rail 3, respectively. In some embodiments the invention, the roller bearing support bracket 2 is replaced by a sliding bearing. Cross rail 3 has two threaded holes, each of which receives the adjusting screw 4. Thus, the adjusting screw 4 mounted for rotation in a transverse rail 3. Each adjusting screw 4 is provided with a retaining plate 5, which acts on the holder brake pads (not shown) or similar tool. Brake pad will come into contact with the brake disc upon actuation of the brake. As you know, the other brake pad is located on the opposite side of the brake disc. Other brake pad in a known manner is put into contact with the brake disc in the movement of the open carriage 16 during actuation of the brake.

Figure 3 shows an example execution of the caliper 16. The caliper has a window 17 in the wall, farthest from the brake disc, and has a notch for us is anouki brake mechanism, made in any of the options described here.

In the support bracket 2 has two shaft 6 to adjust and restore the original position. When the brake mechanism is assembled, the shaft 6 to adjust and restore the original provisions will be inserted into the adjusting screws 4. The shafts 6 to adjust and restore the original position connected with adjusting screws 4 so that they can move in the axial direction but cannot rotate. In addition, the brake mechanism includes a cover 7 attached to the open carriage 16 during Assembly.

The synchronizing shaft 8 mounted in the support bracket 2 and has a gear 9 on each end. Gear 9 is connected with the crown gear 10, without a possibility of rotation connected to the shaft 6 to adjust and restore the original position. The synchronizing shaft 8 carries an adjusting mechanism 12 of known construction. Return spring 11 is located between the cover 7 and the transverse rail 3 for returning the brake mechanism back to its original position. Gear 9, the crown gear 10, the synchronizing shaft 8 and the adjusting mechanism 12 synchronize movement of the shafts 6 to adjust and restore the original position.

The brake mechanism forms a two unit or module. One module consists of a lever 1, gears 9, crown above the Teren 10, the synchronizing shaft 8, the adjustment mechanism 12 and shaft 6 to adjust and restore the original position, and all these parts are made in the bearing bracket 2. For holding these parts in the form of a single block applied to the latch 13 (see Fig.7) for holding the lever 1. Cross rail 3, the cover 7, the return spring 11, the adjusting screws 4 and the thrust plate 5 form the second block of the brake mechanism. The second block is held as a unit by means of brackets 14.

The adjusting mechanism 12 is located on the synchronizing shaft 8, which passes through the adjusting mechanism 12. As noted above, each end of the shaft 8 provided with a gear 9 meshing with a crown gear 10 on the shaft 6 to adjust and restore the original position. When the rotation of the synchronizing shaft 8 by means of the adjusting mechanism 12 shafts to adjust and restore the original position will be synchronously rotated. The result will rotate the adjusting screws 4 into the threaded holes of the cross rail 3 and move it forward to compensate for wear of the brake pads. The action of the adjusting mechanism 12 as such, like the action of the adjusting mechanism 23 described in more detail below. The adjusting mechanism 12, 23 is part of the drive means of the brake mechanism. That is they way synchronization is an optional feature of the drive means.

To protect the brake mechanism from the dirt road between the thrust plate 5 and the cover 7 are corrugations 15. In the shown embodiment of the invention the corrugations 15 are heat-rings.

The support bracket 2 is installed in the window 17 of the caliper 16. The box 17 is located in the wall of the caliper 16, the most remote from the brake disc. Thus, the caliper has an open design. The support bracket 2 has a shelf 18 which is adjacent to the inner surface of the support plate 16, and thus, the support bracket 2 is placed in the window 17 of the carriage 16 from the inner side. The reaction in the form of a compression force of the brake is transmitted through the support bracket 2 open the caliper 16. The reactive force is transmitted through the ledge 18 of the support bracket 2. Since the reactive force is transmitted to the ledge 18 of the support bracket 2, power is transmitted in the area surrounding the window 17 of the caliper 16. The support bracket 2 is loaded part of the brake mechanism, and, thus, the support bracket 2 and the ledge 18 must have sufficient strength to transmit reactive forces. Specialist in the art should understand that the bench can be placed on the support 16, and not on the supporting bracket 2, in which case the reactive force is transmitted through raincry support bracket 2 to the ledge of the caliper 16.

Between the support bracket 2 and open the caliper 16 is placed a seal. The seal between the support bracket 2 and open the caliper 16 is placed in the groove in the bearing bracket 2. The groove and, thus, the seal may be located in any position in the axial or radial direction in the bearing bracket 2. The inner surface of the open carriage 16 may be machined through the window 17 of the caliper 16.

Bracket all described in the application of embodiments of the invention interacts with the caliper in the same manner as described above. Thus, the description of the interaction between the caliper and support bracket will not be repeated in connection with the description of other embodiments of the invention.

In the second embodiment, the brake mechanism shown in Figure 4 and 5, the adjusting mechanism 23 of known construction is located on the upper part of one of the adjusting screws 4. The adjusting mechanism 23 is installed in the support bracket 22. In the bearing bracket 22 between the gears of the shafts 6 to adjust and restore the original position is the number of gears 24. Thus, the two shaft 6 to adjust and restore the original position with the provision of the driving steps are connected by gears 24. The adjusting mechanism 23 communicates the lever 26 by means of the finger 43 of the lever. Each gear is mounted on the pin 25 attached to the support bracket 22. Gear 24 is located under the cover 42 to be inserted into the support bracket 22. Gear 24 in the first part of the drive means and the synchronization is specified as an optional feature. Figure 4 cover 42 for clarity, shown partially. In the example shown applied four gears 24, located between the gears of the shafts 6 to adjust and restore the original position. Specialist in the art will understand that there may be different number of gears.

As in the previous embodiment, the lever 26, the support bracket 22 and the shafts 6 to adjust and restore the original position to form one unit. This block is connected with the second block formed in other parts of the brake mechanism when the disk brake is assembled.

In this embodiment of the invention, the lever 26 is supported by the sliding bearing, located in the support bracket 22. The lever 26 acts on the transverse rail 34 by means of an intermediate part. Intermediate portion in this embodiment of the invention has the shape of a rocking 29, but in other embodiments can have other forms.

In the third embodiment, the brake mechanism shown in Fig.6 and 7, the lever 31 forms one unit with the supporting bracket CAg attached to a supporting bracket 30 by clamps 13. The lever 31 acts on the transverse rail 34 by means of an intermediate part in the form of finger 28. In this embodiment, between the cross rail 34 and the cover 7 is the number of gears 24.

In this embodiment of the invention is made persistent nodes, United with one common thrust plate 38, which acts on the brake pad. Each thrust unit contains the stop screw 39. Resistant screws 39 are drilled in the lower part, which receives the pin located on the thrust plate 38. Pins bearing plate 38 and openings resistant screws 39 are made so as to lock the thrust screws 39, thus preventing their rotation.

One of the thrust units are equipped with an adjusting mechanism 23, as mentioned above, and the adjusting shaft 40. The adjusting mechanism 23 is located on the upper part of the screw 39 and placed in the support bracket 30. Another thrust unit provided with a shaft 41 to restore the original position. The shafts 40, 41 with the provision of the driving steps are connected by a set of gears 24. One gear is connected with the adjusting shaft 40 and the shaft 41 to restore the original positions, respectively. A set of gears 24 is located between the cover 7 and the thrust plate 38.

The adjusting mechanism 23 interacts with the lever 31 by means of the finger 43 of the lever. The shafts 40, 41 and screws 39 thrust units could the t to rotate relative to each other, what is important for regulation of backlash in the disk brake. The shafts 40, 41 are in the form of sleeves that are located outside of the thrust screws 39.

In another embodiment of the invention shown in Fig, a set of gears replaced by a chain 32, located in the area between the cross rail 3 and the cover 7. Circuit 32 communicates with the sprockets of the adjusting shaft 40 and the shaft 41 to restore the original positions, respectively. According to other aspects, the variant shown in Fig corresponds to the variant shown in Fig.6 and 7.

In the variants shown in Fig.4-8, the transverse rail 34 is supported by four protruding parts 36 of the cross rail and the return spring 11 with the lid 7. The protruding portion 36 of the cross rail 34 adjacent to the inner surface of the open caliper 16. Part of the caliper 16, which is in contact with the projecting portions of the cross rails 34, is subjected to machining to obtain a smooth surface. Machining is performed through the open window 17 of the caliper 16. Return spring 11 is directed into the hole of the cross rails 34 and acts between the cross rail 34 and the cover 7. Return spring 11 is inserted into the holder cover 7. The transverse rail 34 can move in the axial direction along the treated part and in the same direction, perpendicular from the priori direction. The last direction is tangential direction relative to the brake discs. In an alternative embodiment of the invention the transverse rail 34 is sent to the guide sleeve (not shown)located around the screws used to attach the cover 7 to the open caliper 16.

The cover 7 is attached to the open support plate 16 by screws. The cover 7 has openings for receiving the thrust units. There is a gap between the cover 7 and resistant hosts, allowing persistent nodes to move in any direction relative to the cover 7.

The following relates to variants of the invention, shown in Fig.4-8. When the brake actuating, lever 26, 31 will be pressed on the transverse rail 34 and, thus, the thrust plate 38 or plate 5 by means of the thrust screws 4, 39 and the brake pads toward the brake disc (not shown). When the brake pads facing the brake disc, the brake pads will move in a tangential direction relative to the brake disc within a short distance until the brake pads will not face a stop (not shown). The movement in the tangential direction relative to the brake disk usually does not exceed several millimeters. The lever 26, 31, an intermediate portion 27, if it is applied, the transverse rail 34 and persistent nodes brake is on mechanism will follow the brake pads in their motion. During this movement of the lever 26, 31 will slide in the support. The transverse rail 34 is moved in the tangential direction relative to the brake disc being directed protruding parts 36 of the cross rail 34 or the guide sleeve. The cover 7 is attached to the caliper 16 and does not move. The relative movement of the cross rail 34 and the cover 7 assumes the return spring 11. When the brake is released, the return spring 11 will return the cross rail 34 back into its Central position. The lever 26, 31, may apply intermediate part 27 and persistent nodes will move with the cross rail 34 in a Central position. Thus, the return spring 11 restores the original position of the brake mechanism as in the axial direction and in the lateral direction.

The adjusting mechanism 23 has a known construction and is the same for all embodiments of the invention, shown in Fig.4-8. When the brake trigger, the finger 43 of the corresponding lever 26, 31 will act on the adjusting mechanism 23. When the distance And passed, the housing of the adjusting mechanism 23 begins to forcibly rotate counterclockwise. Length And specifies the clearance between the brake pads and the brake disc when the brake is not activated.

During braking now the La will pass the distance A. When the continuation of the operation of the braking finger 43 of the lever will rotate the housing of the adjusting mechanism 23. The rotation will be transmitted to the adjusting screw 4 or adjusting shaft 40 depending on the actual options of execution of the brake mechanism.

In the variant shown in Figure 4 and 5, the adjusting screws 4 will rotate relative to the cross rail 34. Both of the adjusting screw will rotate simultaneously through a set of gears 24. Due to this rotation, the position of each bearing plate 5 relative to the brake disc will be changed.

In the variant shown in Fig.6-8, the adjusting shaft 40 will rotate relatively resistant screws 39. The adjusting shaft 40 and the shaft 41 to restore the original position will rotate simultaneously through a set of gears 24. By rotation of the shafts 40, 41 position the bearing plate 38 relative to the brake disc will be changed.

Rotation of the adjusting screws 4 or the adjusting shaft 40 and shaft 41 to restore the original position, respectively, will reduce the gap, if the gap between the brake pads and the brake disc exceeds a preset reference distance. The backlash will be reduced, unless there is opposition and, thus, the torque at the clutch brake pads with the brake disc. Transmission effort when the adjustment is made by spring unilateral action, with the provision of the driving action working between the drive ring and the adjusting sleeve known adjusting mechanism 23. When the brake pads are in the clutch with the brake disc, the torque is such that there will be a slippage between the housing and the adjusting spring inside the adjusting mechanism 23 with continued rotation of the shell.

During the release of the brake torque is not transmitted by the spring unilateral actions, which slides in the direction of rotation. If the play between the brake pads and the brake disc was excessive, and this backlash is eliminated by turning the adjusting screws 4 relative to the cross rail 34 or resistant screws 39 on the transverse rails 34, this new relative position will be maintained during the release of the brakes.

At least one of the shafts 6 to restore the original provisions and regulations and the shaft 41 to restore the original position, respectively, supplemented with an appropriate screw for installation of the tool used to restore the original position of the thrust units when you need to replace the brake pads. This movement will be transmitted to the other shaft 6 to restore the original position and the adjustment or the adjustment shaft 40, respectively, of the group is a rotary dial gear train 24 or circuit 32. Corresponding shaft 6 or 41 rotate in the normal way, while the distance between the thrust plates 5 or plate 38 and the brake disc will not be sufficient for admission of new brake pads. Then the corresponding shaft 6 or 41 rotate so that the distance between the thrust plates 5 or plate 38 and the brake disc comply with the required working clearance. Corresponding shaft 6 or 41 to restore the original provisions inserted into the clogged hole in the support bracket 22, 30.

Specialist in the art will understand that various embodiments of the support bracket, the lever and the intermediate part can be combined in different ways.

1. Disc brake, contains brake and disc brake includes a caliper (16)covering the brake disc and having a recess for mounting the brake mechanism, wherein the brake mechanism includes a support bracket (2, 22, 30), mounted inside the window (17) of the caliper (16) in the wall farthest from the brake disc, the brake mechanism also includes a drive means including an adjusting mechanism (12, 23) and shaft (6, 40, 41) to adjust and restore the original position, and the adjusting mechanism (12, 23) is arranged to actuate the finger (43) lever, RA is put on the lever (1, 26, 31) of the brake mechanism, and the adjusting mechanism (12, 23) installed in the support bracket (2, 22, 30) in the Assembly.

2. Disc brake according to claim 1, characterized in that the brake mechanism has a means for transmitting motion between shafts (6, 40, 41) to adjust and restore the original position.

3. Disc brake on p. 2, characterized in that the means for the transmission of motion is located in the support bracket (2, 22).

4. Disc brake according to any one of the preceding paragraphs, characterized in that the adjusting mechanism (12) is located in the support bracket (2) on the synchronizing shaft (8)connecting shaft (6) to adjust and restore the original position, and the synchronizing shaft (8) passes through the adjusting mechanism (12)and shaft (6) to adjust and restore the original position connected with a synchronizing shaft gears (9) and the crown gear (10).

5. Disc brake according to claim 2, characterized in that the adjusting mechanism (23) is mounted on the adjusting shaft (6, 40) on the upper part of the thrust screw (4, 39) and is adjacent to it.

6 Disc brake according to claim 5, wherein the brake mechanism includes one or more gears (24)located between the shafts (6, 40, 41) to adjust and restore the original position and connected with the provision of the driving steps.

7. Disc brake according to claim 6, characterized in that the gear (24) is located in a recess in the upper part of the support bracket (22) on the pins (25)inserted into the support bracket (22), and installed the cover (42) for closing gear (24)located in the recess of the support bracket (22).

8. Disc brake on p. 6, characterized in that the gear (24) are located in the area between the cross rail (34) and cover (7) of the brake mechanism.

9. Disc brake according to claim 5, characterized in that the means for transmitting motion contains a circuit (32)mounted on the sprockets on the shafts (40, 41) to adjust and restore the original position.

10 Disc brake according to claim 9, characterized in that the circuit (32) is located in the area between the cross rail (34) and cover (7) of the brake mechanism.



 

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7 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building, particularly, to disc brakes. Air controlled disc brake comprises support, brake cylinder and self-booster. Brake support comprises brake shoes arranged on clamp side and counteraction side. Brake cylinder can be loaded with compressed air to generate braking force and to act on clamp for clamping the brake shoe. Said clamp comprises rotary brake lever. Brake shoe on clamp side can displace both parallel with brake disc rotational axis and with brake disc friction surface. Self-booster features boost factor selected so that brake automatically releases after braking. Said factor is smaller than or equals 2.2.

EFFECT: higher reliability, safe and faultless design.

13 cl, 5 dwg

FIELD: transport.

SUBSTANCE: invention relates to air transport, specifically to electromechanical drives of aircraft brakes. The unit consists of two modules installed on flange fixed on wheel axle. Each of the modules has body, thrust plunger, screw mechanism located in the body, electric motor connected with screw drive reducing gear. In the inside axial cavity of the screw, electric motor with rotor is installed. On one of electric motor shaft ends, wave former of the first stage of double-stage harmonic reducing gear and wave former incorporating separator of the first stage of harmonic reducing gear are placed. The separator is connected with electric motor body and has the first intermediate rotation bodies interacting with separator incorporating rigid wheel, with inner waved surface. Rigid wheel of the second stage has shaft installed coaxially with electric motor rotor which shaft has wave former of the second stage of harmonic reducing gear, with separator connected with electric motor body which separator has the second intermediate rotation bodies. Part of screw surface incorporating harmonic reducing gear second stage wave former has inside waved surface.

EFFECT: decreased unit dimensions, higher unit efficiency and reliability.

4 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport, particularly, to rolling stock braking equipment. Proposed device comprises brake shoe to apply friction force by sliding in contact with disc, main case of tongs secured to vehicle and actuator to press brake shoe to disc. Said actuator comprises resilient film secured to tongs main case, drive pressure chamber composed by resilient film to receive fluid, valve feeding said fluid into said chamber and piston arranged between resilient film and brake shoe. Fluid is fed into drive pressure chamber to expand said film towards brake shoe so that piston drives the latter to sliding contact with disc. Said valve feed fluid into drive pressure chamber at brake operation and confines fluid discharge therefrom at brake release.

EFFECT: ruled out abrasion of brake shoe at invariable costs and weight.

4 cl, 5 dwg

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